Export a Shiny app to a directory

Source: R/export.R

This function exports a Shiny app to a directory, which can then be served using httpuv.

export(
  appdir,
  destdir,
  ...,
  subdir = "",
  quiet = getOption("shinylive.quiet", !is_interactive()),
  wasm_packages = NULL,
  package_cache = TRUE,
  max_filesize = NULL,
  assets_version = NULL,
  template_dir = NULL,
  template_params = list(),
  verbose = NULL
)

Arguments

appdir

Directory containing the application.

destdir

Destination directory.

...

Ignored

subdir

Subdirectory of destdir to write the app to.

quiet

Suppress console output during export. Follows the global shinylive.quiet option or defaults to FALSE in interactive sessions if not set.

wasm_packages

Download and include binary WebAssembly packages as part of the output app's static assets. Logical, defaults to TRUE. The default value can be changed by setting the environment variable SHINYLIVE_WASM_PACKAGES to TRUE or 1 to enable, FALSE or 0 to disable.

package_cache

Cache downloaded binary WebAssembly packages. Defaults to TRUE.

max_filesize

Maximum file size for bundling of WebAssembly package assets. Parsed by fs::fs_bytes(). Defaults to "100M". The default value can be changed by setting the environment variable SHINYLIVE_DEFAULT_MAX_FILESIZE. Set to Inf, NA or -1 to disable.

assets_version

The version of the Shinylive assets to use in the exported app. Defaults to assets_version(). Note, not all custom assets versions may work with this release of shinylive. Please visit the shinylive asset releases website to learn more information about the available assets_version values.

template_dir

Path to a custom template directory to use when exporting the shinylive app. The template can be copied from the shinylive assets using: fs::path(shinylive:::assets_dir(), "export_template").

template_params

A list of parameters to pass to the template. The supported parameters depends on the template being used. Custom templates may support additional parameters (see template_dir for instructions on creating a custom template or to find the current shinylive assets' templates).

With shinylive assets > 0.4.1, the default export template supports the following parameters:

  1. title: The title of the app. Defaults to "Shiny app".

  2. include_in_head, include_before_body, include_after_body: Raw HTML to be included in the <head>, just after the opening <body>, or just before the closing </body> tag, respectively.

verbose

Deprecated, please use quiet instead.

Value

Nothing. The app is exported to destdir. Instructions for serving the directory are printed to stdout.

Examples

if (FALSE) { # rlang::is_interactive()
app_dir <- system.file("examples", "01_hello", package = "shiny")
out_dir <- tempfile("shinylive-export")

# Export the app to a directory
export(app_dir, out_dir)

# Serve the exported directory
if (require(httpuv)) {
  httpuv::runStaticServer(out_dir)
}
}